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Finding the Fourth Proportional to 93,118.25, 128,480.78 and 54,879.32

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Solution

The fourth proportional to 93,118.25, 128,480.78 and 54,879.32 is: 75,720.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,118.25 : 128,480.78 = 54,879.32 : x
  2. Step 2: Convert to fraction form
    93,118.25/128,480.78 = 54,879.32/x
  3. Step 3: Cross multiply
    93,118.25x = 128,480.78 × 54,879.32
  4. Step 4: Simplify right side
    93,118.25x = 7,050,937,565.07
  5. Step 5: Solve for x
    x = 7,050,937,565.07/93,118.25
  6. Step 6: Final answer
    x = 75,720.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.